You know, more and more I come across problems like this that are touted as "hereditary" that have very definitive connections to possible vitamin deficiencies. Vitamin deficiencies can be "hereditary" too, as in, if a pregnant mother isn't getting enough of something she's going to pass that deficiency on to her young. She's also likely got whatever health problem those deficiencies cause, and it gets passed on. Then it gets called "hereditary" and people assume that there's nothing they can do about it because well...mom had it, grandma had it, sisters have it...whatever. I wish there was more study on this stuff.